CN111655932A - Reflective raised pavement marker and method of making same - Google Patents
Reflective raised pavement marker and method of making same Download PDFInfo
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- CN111655932A CN111655932A CN201980010100.3A CN201980010100A CN111655932A CN 111655932 A CN111655932 A CN 111655932A CN 201980010100 A CN201980010100 A CN 201980010100A CN 111655932 A CN111655932 A CN 111655932A
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- marker
- side walls
- bottom wall
- intermediate frame
- top wall
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C17/00—Pavement lights, i.e. translucent constructions forming part of the surface
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
- E01F9/524—Reflecting elements specially adapted for incorporation in or application to road surface markings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
- G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/003—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0083—Reflectors
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
Embodiments of the present disclosure relate to retroreflective raised pavement markers (100) and methods (200) of making the same. The marker (100) comprises a marker body (1), at least one intermediate frame (6) and at least one reflective lens (7) such that the marker body (1) fully accommodates the at least one intermediate frame (6) and the at least one reflective lens (7). Furthermore, the manufactured marker (100) is durable, efficient, and has better retention with the ground and better load distribution to the ground.
Description
Technical Field
The present disclosure relates to raised pavement markers. More particularly, the present disclosure relates to retroreflective raised pavement markers.
Background
Raised pavement markers are well known road infrastructure that help provide a visual indication to the driver while driving a vehicle. Raised pavement markers help indicate lanes of traffic while acting as a retarder. Of the various available markers, the most effective and most widely used are reflective raised pavement markers. Reflective raised pavement markers reflect light from headlamps of an oncoming vehicle back to the driver of the vehicle to provide a visual indication of travel. However, there are a number of challenges associated with such retroreflective raised pavement markers. First, known reflective raised pavement markers have poor adhesion to the ground. Second, the mirror plates of known reflective raised pavement markers are damaged by direct impact from the vehicle load. Third, water enters through the damaged lens, causing faster degradation of the marker. Finally, replacing a damaged lens increases the cost of effective use of the marker.
Accordingly, there is a need for improved retroreflective pavement markers that are durable, effective, and have better retention with the ground.
Disclosure of Invention
One aspect of the present disclosure relates to reflective raised pavement markings. The marker includes a marker body having a top wall, a bottom wall, and a plurality of side walls, wherein the top wall includes a plurality of ridges, the bottom wall includes a plurality of undercut grooves, the plurality of side walls connect an edge of the top wall to an edge of the bottom wall at an acute angle relative to the top wall, and at least one of the plurality of side walls includes a lip portion located at an edge of the bottom wall such that the ridges and the lip portion form a recessed portion on the at least one of the plurality of side walls. The marker also includes at least one mid-frame having a weld line, the at least one mid-frame being secured to the recessed portion on the at least one of the plurality of sidewalls. Furthermore, the marker includes at least one mirror plate secured to the at least one intermediate frame.
Another aspect of the present disclosure relates to a method of making a retroreflective raised pavement marker, the method comprising the steps of: producing a marker body having a top wall, a bottom wall, and a plurality of side walls such that at least one of the plurality of side walls connects an edge of the top wall to an edge of the bottom wall at an acute angle relative to the top wall. After this step, a plurality of ridges are formed on the top wall and a plurality of undercut grooves are formed on the bottom wall. A subsequent step includes forming a lip portion on at least one of the plurality of side walls at an edge of the bottom wall such that the ridge and the lip portion form a recessed portion on the at least one of the plurality of side walls. Further steps include securing at least one intermediate frame having weld lines to the recessed portion of the at least one of the plurality of sidewalls. Finally, a final step includes securing at least one mirror plate to the at least one intermediate frame.
Further, the present disclosure discloses a reflective raised pavement marker that is durable, effective, and has better retention with the ground and better load distribution to the ground.
These and other aspects of the present application will be apparent from the detailed description below. In no event, however, should the above summaries be construed as limitations on the claimed subject matter, which subject matter is defined solely by the attached claims.
Drawings
Various aspects of the disclosure will be discussed in greater detail with reference to the accompanying drawings, in which,
FIG. 1 shows an exploded view of a raised pavement marker.
Fig. 2 illustrates an isometric view of a marker body of a raised pavement marker.
FIG. 3 shows a raised pavement marker having a mid-frame with weld lines in the form of a honeycomb structure.
FIG. 4 shows another view of the marker body with an undercut formed in the bottom wall.
Fig. 5 shows a view of a mid-frame with various shapes of weld lines.
Fig. 6 illustrates an isometric view of a raised pavement marker having a stem according to an embodiment of the present disclosure.
FIG. 7 illustrates an isometric view of raised pavement markers according to embodiments of the present disclosure.
The figures are not necessarily to scale. Like numbers used in the figures refer to like parts. It should be understood, however, that the use of a number to refer to a component in a given figure is not intended to limit the component in another figure labeled with the same number.
Detailed Description
In general, the present disclosure relates to a retroreflective raised pavement marker.
Fig. 1 shows an exploded view of a retro-reflective raised pavement marker (100). The marker (100) comprises a marker body (1), at least one intermediate frame (6) and at least one reflective lens (7).
Furthermore, fig. 2-4 show isometric views of the marker body (1). The marker body (1) may be a monolithic body or a modular body in nature. The marker body (1) is made of impact resistant materials such as, but not limited to, Acrylonitrile Butadiene Styrene (ABS), Acrylonitrile Styrene Acrylate (ASA), acrylic, poly (methyl methacrylate) (PMMA), Polycarbonate (PC). In one embodiment, the marker body (1) may be produced using at least one of an extrusion process, an injection molding process, and a pressing process. As shown in fig. 1-4, the marker body (1) includes a top wall (2), a bottom wall (8), and a plurality of side walls (4). The marker body (1) may include, but is not limited to, a trapezoidal cross-section, a prismatic cross-section, and a triangular cross-section. In one embodiment, as shown in fig. 1-4, the marker body (1) has a trapezoidal cross-section. The top wall (2) comprises a plurality of ridges (3) and grooves. The plurality of ridges (3) and grooves help to distribute the load evenly to the marker body (1). The shape of the plurality of ridges (3) may be, but is not limited to, square, rectangular, semi-circular, and triangular. In another embodiment, the plurality of ridges (3) may be symmetrically curved. The top wall (2) of the marker body (1) lies generally parallel to the ground.
The bottom wall (8) is a wall that is in physical contact with the ground. The bottom wall (8) comprises a plurality of undercut grooves (9) (as shown in fig. 1-4). In particular, a plurality of undercut grooves (9) are fixed to the ground and contribute to effective adhesion to the ground. The shape of the plurality of undercut grooves (9) may be, but is not limited to, square, rectangular, semicircular, and triangular. In one embodiment, at least one handle (30) (as shown in fig. 6) projects outwardly toward the ground. The at least one shank (30) contributes to achieving a better anchorage to the marker body (1). Further, the at least one handle (30) may include a plurality of ribs to increase the grip of the at least one handle (30) with the ground. At least one shank (30) is connected to the bottom wall (8) using at least one of friction welding and spin welding. The at least one shank (30) may be, but is not limited to, cylindrical, cubical, and conical.
The plurality of side walls (4) are configured to connect the edge of the top wall (2) to the edge of the bottom wall (8) at an acute angle relative to the top wall (2). The angle may vary from 10 to 80 degrees. Preferably, the angle may vary from 15 degrees to 45 degrees. Further, at least one of the plurality of side walls (4) comprises a lip portion (5) at an edge of the bottom wall (8), such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4). The lip portion (5) is formed in such a manner that the lip portion (5) itself receives a first physical impact of a load on the marker (100). In another embodiment, the lip portion (50) and the ridge (3) may receive a first physical impact of a load on the marker (100). The first physical impact of the load on the lip portion (50) and the ridge (3) prevents the at least one mirror plate (7) from breaking and thus increases the lifetime of the at least one mirror plate (7).
Furthermore, the recessed portion (20) acts as a cavity that completely accommodates the at least one intermediate frame (6) and the at least one mirror plate (7).
The at least one intermediate frame (6) is a frame fixed to a recessed portion (20) on at least one of the plurality of side walls (7). At least one intermediate frame (6) comprises a plurality of weld lines (10) interwoven with one another in a mesh. A plurality of weld lines (10) are interwoven with one another in a mesh by ultrasonic welding resulting in the formation of a plurality of compartments (as shown in fig. 5). The weld line (10) may have different shapes such as, but not limited to, honeycomb, octagon, triangle, trapezoid, and circle. The at least one intermediate frame (6) may be made of, but not limited to, Acrylonitrile Butadiene Styrene (ABS), Acrylonitrile Styrene Acrylate (ASA), acrylic, poly (methyl methacrylate) (PMMA), Polycarbonate (PC). Furthermore, the at least one intermediate frame (6) may be ultrasonically welded to at least one of the plurality of side walls (4).
Furthermore, at least one of the mirror plates (7) is made of an impact-resistant material. The material may include, but is not limited to, acrylic, poly (methyl methacrylate) (PMMA), Polycarbonate (PC). Furthermore, at least one mirror plate (7) is fixed to at least one intermediate frame (6) along a weld line (10). In one embodiment, at least one mirror plate (7) is fixed to at least one intermediate frame (6) along weld lines (10) using ultrasonic welding. Furthermore, at least one mirror plate (7) is connected to the at least one intermediate frame (6) such that the at least one mirror plate (7) acts as an undercut surface between the ridge (3) and the lip portion (5).
Furthermore, the multiple compartments formed by the connection of the multiple bonding wires (10) help to isolate damage to the mirror plate (7) into a single compartment. Thus, the positioning further controls damage along the length and width of the mirror plate (7). Isolating damage within the weld line (10) further protects the mirror plate (7) from damage caused by ingress of dust or water. Moreover, the separation also helps to limit the breaking of the (7) lens as a whole.
In one embodiment, the marker (100) includes a top wall (2), a bottom wall (8), and first, second, third, and fourth side walls. The first sidewall and the third sidewall are opposing sidewalls. Similarly, the second side wall and the fourth side wall are side walls opposite to each other. The first and third side walls include a lip portion (5) that creates a recessed portion (20) at the first and third side walls. Furthermore, the recessed portion (20) accommodates both the at least one intermediate frame (6) and the at least one mirror plate (7).
In another embodiment, as shown in fig. 7, only the first sidewall comprises a lip portion (5) that creates a recessed portion (20) on the first sidewall. Furthermore, the recessed portion (20) accommodates both the at least one intermediate frame (6) and the at least one mirror plate (7).
In yet another embodiment, the first, second and fourth side walls comprise a lip portion (5). Furthermore, the recessed portion (20) accommodates both the at least one intermediate frame (6) and the at least one mirror plate (7).
In another embodiment, the first, second, third and fourth side walls comprise a lip portion (5). Furthermore, the recessed portion (20) accommodates both the at least one intermediate frame (6) and the at least one mirror plate (7).
In another embodiment, each of the first, second, third and fourth sidewalls each comprise two intermediate reflective lenses (7). This further reduces the possibility of breaking the (7) lens as a whole.
Furthermore, Finite Element (FE) analysis is performed on the pavement marker in consideration of the load and boundary conditions on the surface of the top wall (2) of the marker body (1) to which the bottom wall (8) is fixed. The analysis reveals that the load is distributed to the ground along ridges (3) on the surface of the top wall (2) of the marker body (1). The point load on the top wall (2) of the marker body (1) is transferred to the bottom of the marker body (1) rather than the retroreflective lens (7) area. The analysis also shows that the pavement markers of the present invention have a time to failure that is about 75% better than existing pavement markers.
Finite Element (FE) analysis of the pavement marker according to the present disclosure shows that the load is efficiently and optimally directed to the ground, thereby improving the ability of the pavement marker to withstand heavy loads. Again, the finite element analysis and results show that the variation in stress distribution helps to increase the compressive load bearing capacity of the pavement marker. Moreover, controlled test conditions also show that shear failure of the pavement markers of the present invention is along asphalt and concrete surfaces, whereas prior known products show failure at the adhesive bond.
Further, the present disclosure also relates to a method (200) of making a retroreflective raised pavement marker (100). The method (200) begins with the following initial steps: a marker body (1) is prepared having a bottom wall (8) and a plurality of side walls (4) such that at least one of the plurality of side walls (4) connects an edge of the top wall (2) to an edge of the bottom wall (8) at an acute angle relative to the top wall (2). The marker body (1) may be produced using at least one of an extrusion process, an injection molding process, and a pressing process.
Subsequent steps include forming a plurality of ridges (3) on the top wall (2) and a plurality of undercut grooves (9) on the bottom wall (8). Further steps include forming a lip portion (5) on at least one of the plurality of side walls (4) at an edge of the bottom wall (8) such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4). The subsequent step comprises fixing at least one intermediate frame (6) with weld lines (10) to the recessed portion (20) of at least one of the plurality of side walls (4). In one embodiment, at least one intermediate frame (6) is joined to the recessed portion (20) by ultrasonic welding.
Finally, the final step consists in fixing at least one mirror plate (7) to at least one intermediate frame (6). Similarly, in one embodiment, the at least one mirror plate (7) is connected to the at least one intermediate frame (6) by ultrasonic welding, wherein the welding is performed along a weld line (10) of the intermediate frame (6).
The method (200) further comprises the step of connecting the at least one shank (3) to the bottom wall (8) using at least one of friction welding and spin welding.
Accordingly, the present disclosure provides a reflective raised pavement marker that is durable, and has better retention with the ground and better load distribution to the ground.
Unless otherwise indicated, descriptions with respect to elements in the figures should be understood to apply equally to corresponding elements in other figures. Although specific embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations may be substituted for the specific embodiments shown and described without departing from the scope of the present disclosure. This application is intended to cover any adaptations or variations of the specific embodiments discussed herein. Accordingly, the disclosure is intended to be limited only by the claims and the equivalents thereof.
Exemplary embodiments
The following are exemplary embodiments according to the present disclosure:
a marker body (1) having a top wall (2), a bottom wall (8) and a plurality of side walls (4), wherein
The top wall (2) comprising a plurality of ridges (3),
the bottom wall (8) comprising a plurality of undercut grooves (9),
the side walls (4) connect the edge of the top wall (2) to the edge of the bottom wall (8) at an acute angle to the top wall (2), and
at least one of the plurality of side walls (4) comprises a lip portion (5) at an edge of the bottom wall (8) such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4);
at least one intermediate frame having weld lines (10), said at least one intermediate frame being fixed to said recessed portion (20) on said at least one of said plurality of side walls (4); and
at least one mirror plate (7) fixed on the at least one intermediate frame (6).
Embodiment 7. the marker (100) according to any one of the preceding embodiments, wherein the bottom wall (8) having a plurality of undercut grooves (9) is fixed to the ground.
Embodiment 11. the marker (100) according to any one of the preceding embodiments, wherein the at least one mirror plate (7) connected to the at least one intermediate frame (6) acts as an undercut surface between the ridge (3) and the lip portion (5).
Embodiment 12. the marker (100) according to any one of the preceding embodiments, the acute angle varies from 10 to 80 degrees, preferably from 15 to 45 degrees.
Embodiment 13. the marker (100) according to any one of the preceding embodiments, wherein the weld line (10) helps to isolate damage to the at least one mirror (7) when the load is actuated.
Embodiment 14. a method (200) of making retroreflective raised pavement markers (100), the method (200) comprising the steps of:
-preparing a marker body (1) having a top wall (2), a bottom wall (8) and a plurality of side walls (4) such that at least one of the plurality of side walls (4) connects an edge of the top wall (2) to an edge of the bottom wall (8) at an acute angle relative to the top wall (2);
-forming a plurality of ridges (3) on said top wall (2) and a plurality of undercut grooves (9) on said bottom wall (8);
-forming a lip portion (5) on at least one of the plurality of side walls (4) at an edge of the bottom wall (8) such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4);
-fixing at least one intermediate frame (6) with weld lines (10) to the recessed portion (20) of said at least one of the side walls (4); and
-fixing at least one mirror plate (7) to said at least one intermediate frame (6).
Embodiment 15. the method (200) according to any of the preceding embodiments for a method, wherein the at least one intermediate frame (6) is joined to the recessed portion (20) by ultrasonic welding.
Embodiment 16. the method (200) according to any one of the preceding embodiments for a method, wherein the at least one mirror plate (7) is joined to the at least one intermediate frame (6) by ultrasonic welding.
Embodiment 17. the method according to any of the preceding embodiments directed to methods, wherein the ultrasonic welding is performed along the weld line (10) of the at least one intermediate frame (6).
Embodiment 18. the method (200) of any of the preceding embodiments for a method, wherein the method comprises connecting at least one shank (30) to the bottom wall (8) using at least one of friction welding and spin welding.
Embodiment 19. the acute angle varies from 10 to 80 degrees, preferably from 15 to 45 degrees, according to the method (200) of any of the preceding embodiments for a method.
Embodiment 20. the marker (200) according to any of the preceding embodiments for a method, wherein the lip portion (5) is formed such that the lip portion (5) receives a first physical impact when a load on the marker (100) is actuated.
Embodiment 21. the marker (200) according to any one of the preceding embodiments for a method, wherein the upwardly protruding lip portion (5) is formed such that the recessed portion (20) fully accommodates the at least one intermediate frame (6) and the at least one mirrored lens (7).
Claims (15)
1. A retroreflective raised pavement marker (100), the marker (100) comprising:
a marker body (1) having a top wall (2), a bottom wall (8) and a plurality of side walls (4), wherein
The top wall (2) comprising a plurality of ridges (3),
the bottom wall (8) comprising a plurality of undercut grooves (9),
the side walls (4) connect the edge of the top wall (2) to the edge of the bottom wall (8) at an acute angle to the top wall (2), and
at least one of the plurality of side walls (4) comprises a lip portion (5) at an edge of the bottom wall (8) such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4);
at least one intermediate frame (6) having weld lines (10) fixed to the recessed portion (20) on the at least one of the plurality of side walls (4); and
at least one mirror plate (7) fixed on the at least one intermediate frame (6).
2. The marker (100) according to claim 1, wherein the at least one mid frame (6) having weld lines (10) is ultrasonically welded to the at least one of the plurality of side walls (4) and the at least one reflective lens (7) is ultrasonically welded to the at least one mid frame (6).
3. The marker (100) according to claim 1, wherein said ultrasonic welding is carried out along said weld line (10) of said at least one intermediate frame (6).
4. The marker (100) according to claim 1, wherein the marker (100) comprises at least one handle (30) connected to the bottom wall (8).
5. The marker (100) according to claim 2, wherein the at least one handle (300) comprises a plurality of ribs to increase the grip of the at least one handle (30) with the ground.
6. The marker (100) according to claim 1, wherein the marker body (1) is produced using at least one of an extrusion process, an injection molding process, and a pressing process.
7. The marker (100) according to claim 1, wherein the bottom wall (8) having a plurality of undercut grooves (9) is fixed to the ground.
8. The marker (100) according to claim 1, wherein the lip portion (5) receives a first physical impact when a load on the marker (100) is actuated.
9. The marker (100) according to claim 1, wherein the recessed portion (20) acts as a cavity for completely accommodating the at least one intermediate frame (6).
10. The marker (100) according to claim 1, wherein said recessed portion (20) completely houses said at least one intermediate frame (6) and said at least one mirror plate (7).
11. The marker (100) according to claim 1, wherein the at least one mirror plate (7) connected to the at least one intermediate frame (6) acts as an undercut surface between the ridge (3) and the lip portion (5).
12. The marker (100) according to claim 1, the acute angle varying from 10 to 80 degrees, preferably from 15 to 45 degrees.
13. The marker (100) according to claim 2, wherein the weld line (10) helps to isolate damage to the at least one mirror (7) when the load is actuated.
14. A method (200) of making a retroreflective raised pavement marker (100), the method (200) comprising the steps of:
-preparing a marker body (1) having a top wall (2), a bottom wall (8) and a plurality of side walls (4) such that at least one of the plurality of side walls (4) connects an edge of the top wall (2) to an edge of the bottom wall (8) at an acute angle relative to the top wall (2);
-forming a plurality of ridges (3) on said top wall (2) and a plurality of undercut grooves (9) on said bottom wall (8);
-forming a lip portion (5) on at least one of the plurality of side walls (4) at an edge of the bottom wall (8) such that the ridge (3) and the lip portion (5) form a recessed portion (20) on the at least one of the plurality of side walls (4);
-fixing at least one intermediate frame (6) with weld lines (10) to the recessed portion (20) of said at least one of the side walls (4); and
-fixing at least one mirror plate (7) to said at least one intermediate frame (6).
15. The method (200) according to claim 14, wherein the at least one intermediate frame (6) is joined to the recessed portion (20) by ultrasonic welding.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201841003353 | 2018-01-30 | ||
| IN201841003353 | 2018-01-30 | ||
| PCT/IB2019/050681 WO2019150244A2 (en) | 2018-01-30 | 2019-01-28 | Retro-reflective raised pavement marker and a method of manufacturing thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111655932A true CN111655932A (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980010100.3A Pending CN111655932A (en) | 2018-01-30 | 2019-01-28 | Reflective raised pavement marker and method of making same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11952732B2 (en) |
| CN (1) | CN111655932A (en) |
| WO (1) | WO2019150244A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230018669A1 (en) * | 2021-07-07 | 2023-01-19 | Zkxkz, Llc | Expediently Installable Traffic Calming System |
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| CN2586723Y (en) * | 2002-12-05 | 2003-11-19 | 郭文南 | Road reflective marker |
| JP2008190156A (en) * | 2007-02-02 | 2008-08-21 | Sekisui Jushi Co Ltd | Raised marker |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20200370253A1 (en) | 2020-11-26 |
| US11952732B2 (en) | 2024-04-09 |
| WO2019150244A2 (en) | 2019-08-08 |
| WO2019150244A3 (en) | 2019-09-26 |
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